North Korea calls for peace treaty, halt to exercises, to end nuclear tests. reuters.com International progress in reducing the threat of nuclear terrorism has slowed in recent years, and the global nuclear security system remains vulnerable, according to a report released Thursday. japantimes.co.jp Two companies splitting $80 million for nuclear reactor research. thehill.com Exelon Corporation said Thursday that the Peach Bottom Atomic Power Station's Unit 3 in York County, Pennsylvania, had reached a generation milestone of 1,355 megawatts following successful completion of an extended power uprate (EPU) that began in 2009. nuclearstreet.com